baetlbtt



J. T. BARTLBTT. Y

TRUSS.

" No. 345,405. Patented July 13, 1886.

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UNITED VSTATES PATENT OFFICE. l

JASON T. BARTLETT, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF ANDEDWARD E. BUTMAN, or sAME PLAGE.

TRUSS.

SPECIFICATION forming part-of Letters Patent No. 345,405, dated July 13,1886.`

Application' filed May 8, 1886. Serial No. 201,605. (No model.)

To all whom, it may concern:

Be it known that I, JAsoN T. BARTLETT, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented certain Improvements in Trusses, of which the following isa full,`

clear, and exact description, reference being had to the accompanyingdrawings, making part of this specification, in whichx Figure l is afront elevation of a truss constructed in accordance with my invention.Fig. 2 is a plan of the pad and its supportingarm. Fig. 3 is alongitudinal vertical section of the same. section of the same on theline x x of Fig. 3. Figs. 5 and 6 are details in perspective. Fig. 7 isa vertical section through the center of the pad-plate and its socket.

My invention relates to an improvement in trusses for use in casesofhernia; and it consists in a novel combination and arrangement of parts,whereby the pad can be easily and quickly adj usted and held immovablyin difterent positions with respect to its supportingarm to suit therequirements of the particular case to be treated, as hereinafter morefully described, and specifically claimed.

In the said drawings, A represents an ordinary truss-spring, and B thesupporting-arm which carries the pad D, which is of the usual form. Theupper end of the arm B is secured to a plate, c, at one end of thetrussspring by a pivot-screw, d, on which it turns as a center, a pin,e, on the arm B tting into one of a series of holes,f, in the platee,whereby the arm may be adjusted, as desired, to vary its position withrespect to the truss-spring fora rupture on the right or left side,according to the requirements of the case, the adjustment being effectedby loosening the screw d to allow the pin e to be moved from one holefto another, and then tightening the said screw to hold the partssecurely together.

The arm B is connected at its lower end to the pad-plate G by means of aball-and-socket or universal joint, the-construction of which I will nowdescribe.

On the plate G is formed a socket, h,which is struck up from the underside, and within this socket fits a hemispherical block, i, the neck kof which extends up through the open- Fig. 4 is a transverse vertical`ing Z, Fig. 7, at the top of the socket, and is iiattened on two sides,as seen in Fig. 5, to enable it to t into a slot or aperture, m, at theend of the arm B, to which it is securedby 5 5 a flat-headed screw, u,which ts a threaded aperture in the neck of the block i, which is thusprevented from turningindependently 0f the arm B, the neck 7c extendingabout halfway through the slot m, as seen in Figs. 8 and 6o 4, 1andbeing prevented by its iiattened sides from turning within the saidslot. Between the under side of the arm B and the socket h is placed aninverted cup, q,which fits closely over the outside of the socket h, andis provided with a central aperture,r,through which extends the neck kof the block i. At the top of the cup q,on opposite sides of thesame,are formed two projections, s s, Fig. 6, which are in line with theiiattenedupper portion of the 7o neck k, and t snugly within the slot oraperture m of the arm B, extending about half-way through the same, theunder side of the arm resting on the shoulderst t of the cup, and thuslwhen the screw a is turned down firmly in place the cup g is preventedby the projections s from turning independently of the arm B, and islocked immovably thereto.

The neck 7c and cup q can be moved longitudinally within the's'lot m tovary the eftect- 8o ive length of the arm B,but,if desired,a squareaperture can be employed instead of a slot. I prefer the slot, however,on account of the advantages of the adjustment which it affords.

When the screw nis loosened,the above-de- 8 5 scribed universal jointwill allow the pad D to be easily and quickly adjusted in any position,or at any angle desired to press inward and upward, or otherwise,according to the particular requirements of the case to be 9o treated,after which it is secured immovably in place by tightening the saidscrew n,which not only causes the block i to be drawn up tightly againstthe inside of the socket h, but also, by reason of the arm B resting onthe shoulders t of the cup q, causes the interior of the latter to bepressed downward against the outside of the socket h, the area of thebearing-surfaces and consequent friction being thus materiallyincreased, whereby,wl1en the parts Ioo are clamped by the screw a afterhaving been adjusted, all liability of slip is avoided,which D, of thepad-plate G,having the socket h, the

block ,tting Within said socket, and having a neck, Ic, extending upthrough the same,the cup q,itting over the outside of the socket 71.,and having the projections s s, shoulders t t,

and aperture r for the passage oi' the neck 7c, the pad-supporting armB, provided with an aperture for the reception of the upper end of zothe neck 7c and the projections s .s of the cup,

and the clamping-screw n, adapted to enter the neck k and simultaneouslydraw the block against the interior of the socket 7L and force the cup qdown upon the outside of the same, all operating substantially in themanner and for the purpose set forth.

Witness my hand this 10th day of March, A. D. 1886.

JASON T. BARTLETT.

In presence of- P. E. TEsoHEMAonER, IV. J. CAMBRIDGE.

